风雪共同作用下大跨度双曲屋盖数值模拟研究

Wind-induced snow drift may cause the collapse of buildings,thus affecting peoples property and personal safety.Therefore,the combined effect of wind and snow can not be ignored in the design of long-span structures.This paper is based on the mixture multiphase flow model and k-kl- model,using Euler-Euler method.Four kinds of large span hyperbolic roof structures with projection shapes of square,rectangular,circular and elliptical are selected as the model structures.When the wind direction angle is different,the curve of wind-induced snow pressure coefficient and snow distribution coefficient cloud map on the roof surface of the four structures under the combined action of wind and snow are studied.In addition,they are compared and analyzed.The results show that the wind-induced snow pressure coefficient of four roof structures under wind-induced snow drift is larger than that under single wind.The position of the maximum wind-induced snow pressure coefficient on the surface of the four roof structures is different.When the wind direction angle is different,the order of pressure on the roof surface from large to small is rectangular,elliptical,square and circular roof.